Research Article
Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl
Table 4
The results of shear strength parameters during cyclic wetting-drying process.
| Types of soil | Shear strength under different vertical pressures (kPa) | Internal friction angle | Cohesion | Note | 50 | 100 | 150 | 200 | /° | c/kPa |
| Natural soil | | | | | | | | 0th cycle | 19.1 | 29.6 | 37.6 | 40.7 | 8.3 | 13.5 | Saturated samples | 2nd cycle | 15.8 | 24.3 | 32.1 | 36.1 | 7.8 | 9.9 | 4th cycle | 11.6 | 16.5 | 25.7 | 30.7 | 7.6 | 4.5 | Improved soil | | | | | | | 0th cycle | 41.9 | 50.3 | 58.6 | 74.4 | 12.0 | 29.8 | 2nd cycle | 36.9 | 43.6 | 49.8 | 65.3 | 10.4 | 26.0 | 4th cycle | 30.4 | 36.4 | 43.2 | 56.1 | 9.5 | 20.6 |
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